Thermodynamics of Ayón-Beato–García–AdS black holes in 4D Einstein–Gauss–Bonnet gravity

Belhaj, A.; Sekhmani, Yassine

doi:10.1140/epjp/s13360-022-02495-z

Cited by 21 publications

(6 citation statements)

References 38 publications

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“…Whereas, Li and Yang [32] obtained a four-dimensional metric for a BH immersed in perfect fluid dark matter. The coupling of 4D EGB gravity and different fields has also been studied; see [33][34][35][36][37][38][39][40][41][42]. Wang and Ge [34] derived a 4D BH metric in EGB gravity in Maxwell's field and coupled with scalar fields.…”

Section: Jcap10(2023)058mentioning

confidence: 99%

4D Einstein-Gauss-Bonnet black hole in Power-Yang-Mills field: a shadow study

Zubair,

Raza,

Sarikulov

et al. 2023

J. Cosmol. Astropart. Phys.

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We consider a static black hole immersed in the Power-Yang-Mills field in four-dimensional Einstein-Gauss-Bonnet gravity and investigate the effect of various parameters on the radius of the photon sphere. The modified form of the Newman-Janis algorithm is used for obtaining a rotating black hole solution in this gravity. Further, we try to explore the influence of the Yang-Mills magnetic charge Q with power q, Gauss-Bonnet parameter α, and spin a on the horizon radius. The geodesic equations are constructed by incorporating the Hamilton-Jacobi formalism. The radial component of the geodesic equations gives the effective potential which is further used in deriving the mathematical structure for the shadows by using Bardeen's procedure for a fixed observer at infinity. The shadows are calculated and plotted in terms of two celestial coordinates for an equatorial observer. It is observed that all the parameters have a very significant effect on the shadow and related physical observables. We also obtain the constraint values for the spin, magnetic charge, and Gauss-Bonnet parameters, using the shadow size of supermassive black holes Sagittarius A* and M87* from the EHT observations for the cases of q = 0.6 and q = 0.9. It is shown that there are upper and lower bounds for the charge and spin of M87* at q = 0.6, while only the upper bounds for the charge and spin of Sagittarius A*. Finally, we investigate the energy emission rate in the Hawking radiation around the 4D Einstein-Gauss-Bonnet black hole in the Power-Yang-Mills field.

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Section: Jcap10(2023)058mentioning

confidence: 99%

4D Einstein-Gauss-Bonnet black hole in Power-Yang-Mills field: a shadow study

Zubair,

Raza,

Sarikulov

et al. 2023

J. Cosmol. Astropart. Phys.

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“…The purpose of examining such an extension of GR is considered a step toward reinforcing the general theory of relativity and establishing solid approaches to it. Nowadays, most works are taken in the essence of modifying gravity through the study of phase transitions [42][43][44][45][46][47][48][49], quasi-normal modes [50][51][52][53][54][55][56], and shadow behavior for black hole spacetime [57][58][59][60][61][62].…”

Section: Introductionmentioning

confidence: 99%

Phase structures and critical behavior of rational non-linear electrodynamics Anti de Sitter black holes in Rastall gravity

Sekhmani,

Gogoi,

Myrzakulov

et al. 2024

Commun. Theor. Phys.

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This research paper presents a black hole solution with a rational non-linear electrodynamics source in the Rastall gravity framework. The paper analyzes the thermodynamic properties of the solution in normal phase space and explores its critical behavior. The phase structure is examined using the extended first law of thermodynamics, with the cosmological constant $\Lambda$ serving as pressure $P$. The isotherms exhibit van der Waals behavior at small values of horizon $r_+$. The paper also investigates the Gibbs free energy behavior and finds two critical points with two pressures where the reentrant phase transition occurs and disappears. On the other hand, we explore the prevalent microstructure of black holes in Ruppeiner geometry, uncovering significant deviations in the nature of particle interactions from conventional practice. Moreover, the thermodynamic geometry is analyzed using the Ruppeiner formalism, with the normalized Ricci scalar indicating possible point-phase transitions of the heat capacity, and the normalized extrinsic curvature having the same sign as the normalized Ricci scalar. The three-phase transitions of the heat capacity are those that we find for the normalized Ruppeiner curvatures. Thus, there is an absolute correspondence.

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“…Hence, the cosmological constant Λ with two magnitudes of Λ > 0 and Λ < 0 which are labeled as pressures of de-Sitter and anti-de Sitter space-time, respectively . Some examples of studying the thermodynamic properties and phase transitions of AdS/dS black holes in GR [45,46,47,48,49,50] and also in modified gravity theories [51,52,53,54,55,56,57,58,59,60,61,62,63,64,65] (see also references therein) are discussed. This work is managed as follows.…”

Section: Introductionmentioning

confidence: 99%

Modified gauge invariant Einstein Maxwell gravity and Thermodynamic phase transition of anti de Sitter ReissnerNordstrom black holes

Ghaffarnejad

Ghasemi

2023

Preprint

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By contracting Ricci tensor of metric field with electromagnetic tensor field we make a scalar term added with the Einstein-Maxwell (EM) gravity Lagrangian density and then obtain modified Reissner Nordstrom (RN) black hole metric via perturbation method. In fact our motivation in use of this alternative gravity theory instead of the EM gravity is based on influence of cosmic magnetic field throughout the space time as inevitable effect at duration of cosmic inflation. Our goal in this work is investigation of contribution of this interaction term on the Hawking temperature and possibility of phase transitions too.

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Thermodynamics of Ayón-Beato–García–AdS black holes in 4D Einstein–Gauss–Bonnet gravity

Cited by 21 publications

References 38 publications

4D Einstein-Gauss-Bonnet black hole in Power-Yang-Mills field: a shadow study

4D Einstein-Gauss-Bonnet black hole in Power-Yang-Mills field: a shadow study

Phase structures and critical behavior of rational non-linear electrodynamics Anti de Sitter black holes in Rastall gravity

Modified gauge invariant Einstein Maxwell gravity and Thermodynamic phase transition of anti de Sitter ReissnerNordstrom black holes

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